sightseeing

 

 

Even cold, drizzly weather didn't keep the tourists from "oohing" and "aahing" at the steaming thermal features.  Although caustic, the hot steam actually felt good! The Mammoth Hot Spring Terraces were first described by the 1871 Hayden Survey. The Terraces constantly change shape and thermal activity changes the color.  Fresh travertine is bright white and changes to gray as it weathers.

 

Mammoth Hot Springs

Yellowstone National Park, Wyoming

9.15.2015